We've changed the way we are organizing our disptaches from the road.  Orginally, we used categories.  There were 6 or so categories like "This Site" "Preparation" and "Blogging and Gadgetry". Now, we're using tags, which are basically keywords that we assign to each post instead of an overall category. We can have a number of different tags across all the posts and whenever posts share the same tag, they are viewable by clicking the tag.

For instance, almost everything we're writing lately is about "preparation".  But, there are a bunch of different things about preparation, like preparing this site, our luggage, gadgets, etc.  Having multiple tags lets us group related posts together across a large number of key words.

Plus, we get a cool "tag cloud" that enables easy browsing of all the tags.